That one might've been a fluke of pretty bad QC right from day one sorta like
>>7929217 mentioned, with some bad pitting on the surface of the joints. Gave up on it, when four months after getting it, right elbow joint split under that brown plastic 'sleeve'part. Got it reclaimed for the cost and some extra by Bandai at the time, but it's left me being wary of going for a last-of-the-order Eva-02 and Crossbone X-2 that I've been considering from the middleman.
Ended up cashing in the collection, before I got the M9 Gernsback(s); which might be the only ones I keep.
Still, glad that the MRDs are so far not affected as bad with my articulation fears hahaha!
Pic-related is the only type of metal content figures I trust sadly these days. Though I guess is it's mostly Bandai avoided die-cast in the joints with some in this line.